After you have done that, in the future, when you want to sign into your Madefire account, use the “Log in with deviantART”, and you’ll have all your existing pages and assets, and you will be set to upload to the correct Sta.sh account.

To publish to your dA page simple check the box called 'Upload to Sta.sh' at the bottom of the 'Project properties' rollout, and your motion book will appear in Sta.sh on dA! From there you can publish your book to your page!